Making statements based on opinion; back them up with references or personal experience. You can see the violation mode is shutdown and that the last violation was caused by MAC address 0090.cc0e.5023 (H1). The interfaces that Im working with are both showing up/up. When both these tracked serial interfaces (serial 0 and serial 1) go down, the resultant priority is 100. Thanks for contributing an answer to Server Fault! This diagram illustrates the protocol stack used on a POS interface. If the line protocol of the specified interface goes down, the HSRP priority is reduced. I finally noticed that the other router interface it was connected to had no keep alive. Probable reasons for this are encapsulation and clock rate mismatches. Find answers to your questions by entering keywords or phrases in the Search bar above. Protocol field values in the "c***" to "f***" range identify packets as link-layer Control Protocols (such as LCP). Spanning-tree port status is in listening yet. Would the reflected sun's radiation melt ice in LEO? This problem is resolved in Cisco bug ID CSCdp86387 (registered customers only) . Change the cables and SFP. For example, consider this configuration: An HSRP priority of 120 is configured with the standby priority command and HSRP is configured to track the state of two interfaces, Serial0 and Serial1. Thanks Lus! Corgon-6000# Mar 11 12:11:23.406: %LINEPROTO-5-UPDOWN: Line protocol on Interface Vlan151, changed state to up. If it doesn't, consider the switch port defective. - edited By clicking Post Your Answer, you agree to our terms of service, privacy policy and cookie policy. I'm using a Cisco Catalyst 2960-X Series. From the access switch, the uplink is always up. When R1 is the active router all the traffic from the hosts (Host 1, 2, 3) to the servers is routed through R1. If the problem persists, check other hardware components. Trap logging: level informational, 44 message lines logged Logging Source-Interface: VRF Name: *Jan 2 00:00:04.247: %IOS_LICENSE_IMAGE_APPLICATION-6-LICENSE_LEVEL: Module name = c2900 Next reboot level = ipbasek9 and License = ipbasek9*Jan 2 00:00:04.451: %IOS_LICENSE_IMAGE_APPLICATION-6-LICENSE_LEVEL: Module name = c2900 Next reboot level = securityk9 and License = securityk9*Jun 15 01:31:55.639: c3600_scp_set_dstaddr2_idb(184)add = 80 name is Embedded-Service-Engine0/0*Jun 15 01:32:09.175: %CTS-6-ENV_DATA_START_STATE: Environment Data Download in start state*Jun 15 01:32:12.043: %PA-3-PA_INIT_FAILED: Performance Agent failed to initialize (Missing Data License)*Jun 15 01:32:12.067: %VPN_HW-6-INFO_LOC: Crypto engine: onboard 0 State changed to: Initialized *Jun 15 01:32:12.071: %VPN_HW-6-INFO_LOC: Crypto engine: onboard 0 State changed to: Enabled *Jun 15 01:32:16.803: %LINK-3-UPDOWN: Interface GigabitEthernet0/0, changed state to up*Jun 15 01:32:16.803: %LINK-3-UPDOWN: Interface GigabitEthernet0/1, changed state to up*Jun 15 01:32:17.619: %LINEPROTO-5-UPDOWN: Line protocol on Interface Vlan1, changed state to down*Jun 15 01:32:17.851: %LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet0/0, changed state to up*Jun 15 01:32:17.851: %LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet0/1, changed state to up*Jun 15 01:32:18.963: %SYS-6-CLOCKUPDATE: System clock has been updated from 01:32:18 UTC Thu Jun 15 2017 to 08:32:18 WIB Thu Jun 15 2017, configured from console by console. There are no specific prerequisites for this document. Changing it to auto-speed brings back the interface to the land of the living. All rights reserved. Exceptions may be present in the documentation due to language that is hardcoded in the user interfaces of the product software, language used based on RFP documentation, or language that is used by a referenced third-party product. Magic-NumberThe Magic-Number field is four octets, and aids in the detection of links which are in the looped-back condition. Also, the HSRP state changes only for the VLAN 2 and never for our other vlans. Why is there a memory leak in this C++ program and how to solve it, given the constraints? RFC 2615 specifies the use of PPP encapsulation over SONET or SDH links. I don't know why, but the switch couldn't work properly with that port. Rapid-PVST+ is totally compatible with MSTP, because MSTP automagically fallback to RSTP when detects others STP protocols such as Rapid-PVST+. - Use syslog to implement centralized logging. This change makes the R2 priority of 100 higher. - Use a remote access utility such as SSH to access router and switch consoles remotely. Use syslog to implement centralized logging. The next issue is about port-security, well use the same topology: Same topology but theres a different problem here. Ethernet0 is administratively down, line protocol is down: This output indicates that a local interface has been manually shut down using the shutdown command. If the Ping fails, it points to a cable or SFP problem. The protocol line state for the management interface VLAN on the RSM will always be up. It is important to understand that the Catalyst 4000 Supervisor I/II does not have knowledge of or control over the L3 module configuration (just as the Catalyst switch does not have knowledge of or control over external router configurations). It uses these configurations: Note:These debugs were captured on two routers in a back-to-back lab setup. The information in this document is based on these software and hardware versions: The information in this document was created from the devices in a specific lab environment. Oct 1 05:35:25 UTC: %LINEPROTO-5-UPDOWN: Line protocol on Interface Vlan2, changed state to down. Now, if the R1 serial 0 interface comes back up, the R1 priority is 105, again. Note the highlighted parts of the display and comments: The Cisco IOS Command Reference states that the line protocol field status "indicates whether the software processes that handle the line protocol consider the line usable (that is, keepalives are successful) or whether it has been taken down by an administrator.". How is the "active partition" determined when using GPT? Perform a local loop test first, and then a remote test. At this point the R2 HSRP priority is higher than R1, and R2 takes over as the active router. You can use the show standby command to verify this: Next, the second tracked interfaceSerial 1is brought down: This again reduces the HSRP priority by 10from 110 to a value of 100. When a lower priority active router receives a Coup message or a Hello message from an active, higher priority router, the router changes to the Speak state and sends a resign message. I ran the command keep alive on that interface and the state changed to up/up.. Did any answer help you? FWD to BLK) ? Thanks, 66 more replies! 2023 Cisco and/or its affiliates. Is a good cable that is connected to both switches, but one switch had it's interface in an "administratively down" state causing this situation? You need to investigate why this line protocol is not up. The router VLAN interfaces have to fulfill the following general conditions to be up/up: VLAN exists and is in active status on the switch VLAN database. Move the card to a new slot to restore proper line-protocol status. The sender of the Terminate-Request should disconnect after receiving a Terminate-Ack, or after the Restart counter expires. Keepalives are disabled automatically on most POS router hardware. Server Fault is a question and answer site for system and network administrators. Debugging during these periods decreases the likelihood that increased debug command processing overhead affects system use. You should see a path alarm indication signal (P-AIS) on router 7507a and a path remote defect indication (P-RDI) on 7507b. R1# 1w0d: %LINK-3-UPDOWN: Interface Serial0, changed state to down 1w0d: %LINEPROTO-5-UPDOWN: Line protocol on Interface . Thus, packet over SONET is more accurately PPP over SONET or HDLC over SONET. When R2 becomes the active router all the traffic from the hosts to the servers is routed through R2. Refer toCisco Technical Tips Conventions for more information on document conventions. Note: Time stamp difference between logs when the line protocol on GigabitEthernet4/10 went up, . Line protocol on Interface Vlan613, changed state to down *Jun 15 01:32:21.115: %LINK-5-CHANGED: Interface Embedded-Service-Engine0/ . *Jun 15 01:32:17.619: %LINEPROTO-5-UPDOWN: Line protocol on Interface Vlan1, changed state to down *Jun 15 01:32:17.851: %LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet0/0, changed state to up . %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/1, changed state to down %LINK-3-UPDOWN: Interface FastEthernet0/1, changed state to down. The last MAC address seen on the interface is 000c.2928.5c6c. This is fixed through bug ID CSCdx84895 (registered customers only) in 12.1.13E and later releases. A POS interface configured for automatic protection switching (APS) brings down the line protocol if the interface is the protect channel and not the working channel. Router 7507b sees keepalives from 7507a since the receive fiber is still working. Interface link parameters must match at both ends of the link. this can only confirm based on some more inputs. PPP is not aware of APS. Start by replacing the cable connected to the port with a new one. Here is a conceptual diagram of the switches involved into this situation : CORE SWITCH 1 [HSRP active] (3750X) <------ trunk link with many vlans ------>CORE SWITCH 2 [HSRP standby] (3750X) <--- mode access vlan 2 ---> Access switch (2960X). FastEthernet 0/1 is showing down. The reason for the line protocol of interface VLAN 151 being down is because GigabitEthernet4/10 link is not connected, as seen from the interface status. Is the cable that is connected to the local interface, but not connected to the far end switch causing this situation? In my case, use different prefix length can cause this problem. How to react to a students panic attack in an oral exam? At least we now know that there are no cable, speed or duplex errors. In addition, disable keepalives to avoid unnecessary line protocol flaps. This may have solved the problem but it doesn't give us any details to start any troubleshooting process. Instead R1 would have remained the active router. Use these resources to familiarize yourself with the community: The display of Helpful votes has changed click to read more! *Jun 15 01:32:19.759: %SYS-5-CONFIG_I: Configured from memory by console*Jun 15 01:32:20.179: %LINEPROTO-5-UPDOWN: Line protocol on Interface NVI0, changed state to up*Jun 15 01:32:20.723: %LINEPROTO-5-UPDOWN: Line protocol on Interface Vlan613, changed state to down*Jun 15 01:32:21.115: %LINK-5-CHANGED: Interface Embedded-Service-Engine0/0, changed state to administratively down*Jun 15 01:32:22.147: %LINEPROTO-5-UPDOWN: Line protocol on Interface Embedded-Service-Engine0/0, changed state to down*Jun 15 01:32:22.919: %LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet0/0/0, changed state to down*Jun 15 01:32:22.919: %LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet0/0/1, changed state to down*Jun 15 01:32:22.919: %LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet0/0/2, changed state to down*Jun 15 01:32:22.919: %LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet0/0/3, changed state to down*Jun 15 01:32:23.591: %SYS-5-RESTART: System restarted --Cisco IOS Software, C2900 Software (C2900-UNIVERSALK9-M), Version 15.4(3)M3, RELEASE SOFTWARE (fc2)Technical Support: http://www.cisco.com/techsupportCopyright (c) 1986-2015 by Cisco Systems, Inc.Compiled Fri 05-Jun-15 13:24 by prod_rel_team*Jun 15 01:32:23.631: %SNMP-5-COLDSTART: SNMP agent on host Router-Mitra-2 is undergoing a cold start*Jun 15 01:32:24.555: %CRYPTO-6-ISAKMP_ON_OFF: ISAKMP is OFF*Jun 15 01:32:24.555: %CRYPTO-6-GDOI_ON_OFF: GDOI is OFF*Jun 15 01:32:24.555: %CRYPTO-6-ISAKMP_ON_OFF: ISAKMP is OFF*Jun 15 01:32:24.555: %CRYPTO-6-GDOI_ON_OFF: GDOI is OFF*Jun 15 01:32:24.555: %CRYPTO-6-ISAKMP_ON_OFF: ISAKMP is ON*Jun 15 01:32:25.287: %LINEPROTO-5-UPDOWN: Line protocol on Interface Vlan1, changed state to up*Jun 15 01:32:26.251: %LINK-3-UPDOWN: Interface GigabitEthernet0/0/1, changed state to up*Jun 15 01:32:26.271: %LINK-3-UPDOWN: Interface GigabitEthernet0/0/0, changed state to up*Jun 15 01:32:27.251: %LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet0/0/1, changed state to up*Jun 15 01:32:27.271: %LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet0/0/0, changed state to up*Jun 15 01:32:55.271: %LINEPROTO-5-UPDOWN: Line protocol on Interface Vlan613, changed state to up*Jun 15 01:33:02.227: %SEC_LOGIN-5-LOGIN_SUCCESS: Login Success [user: admin] [Source: 10.1.191.51] [localport: 23] at 08:33:02 WIB Thu Jun 15 2017*Jun 15 01:34:26.295: %SEC_LOGIN-5-LOGIN_SUCCESS: Login Success [user: admin] [Source: 10.1.10.2] [localport: 23] at 08:34:26 WIB Thu Jun 15 2017*Jun 15 01:35:20.695: %SYS-6-LOGOUT: User admin has exited tty session 388(10.1.191.51)*Jun 15 01:35:47.567: %SYS-6-LOGOUT: User admin has exited tty session 389(10.1.10.2)*Jun 15 01:36:15.639: %SEC_LOGIN-5-LOGIN_SUCCESS: Login Success [user: admin] [Source: 10.1.191.200] [localport: 23] at 08:36:15 WIB Thu Jun 15 2017*Jun 15 01:36:36.651: %SEC_LOGIN-5-LOGIN_SUCCESS: Login Success [user: admin] [Source: 172.30.60.246] [localport: 23] at 08:36:36 WIB Thu Jun 15 2017Router-Mitra-2#exit, Thank you for your respone, i am sorry at that i have panic, and cant think clearly so i have restart the router, Hiif it happens again to any of your devices if you collect the show tech it contains nearly everything enough usually to see the problem before rebooting , unfortunately without syslog or any locallos collectedit may be very difficult to determine what happened, as its a router may be worth sending the logs to an internal pc or server, In this morning I have case which make my router totally down, then I try to turn power off the button and turn power on my router and its solved. Lets try a ping: Unfortunately our pings are not working. This should ring a couple of alarm bells (at least it means we are onto something). The information presented in this document was created from devices in a specific lab environment. When an external event, such as carrier detection or network administrator configuration, indicates that the physical layer is ready to be used, PPP proceeds to the link establishment phase. 10-02-2019 My switch is permanently changing the state of port GigabitEthernet1/0/1 from up to down and from down to up. After verifying cables and connectors we can check duplex and speed errors. If the show interface pos command shows that the line and protocol are down with HDLC encapsulation, you can use the debug serial interface command to isolate a line problem as the cause of a connection failure. VLAN trunking between Juniper EX -> Cisco Catalyst -> and Cisco Router. Check the status of port 3/1 assigned to VLAN 15. Gongratulations Ren, here it is a very useful lesson. Jordan's line about intimate parties in The Great Gatsby? POS interfaces support PPP in High-Level Data Link Control (HDLC)-like framing, as specified in RFC 1662 , for data encapsulation at Layer 2. The Data field is zero or more octets, and contains uninterpreted data for use by the sender. is good cable that connected to both switches, but one switch had it's interface in "administratively down" state, will cause that situation. Refer to Cisco bug IDCSCdp72834 for more information. Only registered Cisco users can access internal bug information. In the question, the interface is layer-1, and the line protocol is layer-2. Use show port-security interface to see the port security details per interface. For retransmissions, the Identifier can remain unchanged. You can use this to only allow specific MAC addresses. LCP uses Terminate packets to close the link. The latest implementation of the autostate feature allows synchronization to Spanning-Tree Protocol (STP) port status. Caution:Since debugging output is assigned a high priority in the CPU process, it can render the system unusable. Aug 4 14:48:36.323 UTC: %LINEPROTO-5-UPDOWN: Line protocol on Interface Embedded-Service-Engine0/0, changed state to down I've rebooted a few times, tried removing all connections to the device. Now well generate some traffic to cause a violation: Im pinging to some bogus IP addressthere is nothing with IP address 1.2.3.4; I just want to generate some traffic. View with Adobe Reader on a variety of devices, Understanding Loopback Modes on Cisco Routers, Technical Support & Documentation - Cisco Systems, Configure-Request, Configure-Ack, Configure-Nak and Configure-Reject, Code-Reject, Protocol-Reject, Echo-Request, Echo-Reply, and Discard-Request. Switch interfaces are layer-2 interfaces, but if you can address it, then you have enabled layer-3 and it is a router interface. *Mar 1 01:54:39.699: %LINEPROTO-5-UPDOWN: Line protocol on Interface Tunnel0, changed state to up. The interface will be in up/down state? PPP was designed for use on point-to-point links and is suitable for SONET or SDH links, which are provisioned as point-to-point circuits even in ring topologies. If the problem persists, check other hardware components. Change the cables and SFP. In order to establish communication over a point-to-point link, each end of the PPP link must first send LCP packets to configure and test the data link. From the core switch logs, I can sometimes see the following behavior : Oct 1 05:34:39 UTC: %LINEPROTO-5-UPDOWN: Line protocol on Interface Vlan2, changed state to up. And as you can see, the HSRP state is therefore impacted. How is "He who Remains" different from "Kang the Conqueror"? Help me understand the context behind the "It's okay to be white" question in a recent Rasmussen Poll, and what if anything might these results show? Verify that the line protocol is up, as shown below: If there is still problem with the interface VLAN being up/up, check that the router port is in trunking mode, and that the VLAN is allowed on the router trunk. All rights reserved. However, although closely related, PPP and HDLC are not the same, and different debug commands are used to troubleshoot line protocol problems. As you can see, it is now down. Note:Autostate synchronized with STP was introduced in code 12.1(8a)E and later. Configure the interface in local loopback. The receiver of a Terminate-Request should wait for the peer to disconnect, and must not disconnect until at least one Restart time has passed after sending a Terminate-Ack. Ill show you what happens in a bit. If so, you should accept the answer so that the question doesn't keep popping up forever, looking for an answer. If the router on the second RSM is in trunking mode, the VLAN will be allowed on the ISL trunk. To subscribe to this RSS feed, copy and paste this URL into your RSS reader. Can you please tell me where did you discussed this topic. The data may consist of any binary value. This allows traffic to flow between the two RSMs on that VLAN without disabling the autostate feature. Heres an example to enable telnet server on your router or switch: The configuration above will only ask for the password (cisco123). POS interfaces support multiple encapsulations - HDLC, PPP and Frame Relay. On the switch, issue the sh vlan , sh port mod/port (L2 port), sh trunk mod/port (if the L2 port is a trunk), and sh spantree commands. However the interface exists even if the module isn't present. Additionally, you should keep the following in mind when troubleshooting fibre based interfaces: Hi Laz, loopbackIndicates whether loopback is set. For this reason, use debug commands only to troubleshoot specific problems or during troubleshooting sessions with Cisco technical support staff. Exceptions may be present in the documentation due to language that is hardcoded in the user interfaces of the product software, language used based on RFP documentation, or language that is used by a referenced third-party product. This probably means another call to the helpdesk and you bringing the interface back to the land of the living! If they are not, a possible timing problem exists on the interface card or in the network. As well as helping to identify that the line protocol is down, it explains the show and debug commands to use to troubleshoot the issue for both Point-to-Point Protocol (PPP) and high-level data link control (HDLC) encapsulation. The sc0 should always be up after the switch boots. IdentifierOn transmission, the Identifier field must be changed whenever the content of the Data field changes and whenever a valid reply has been received for a previous request. Ping from one VRF to the other VRF. I miss the valuable information because at that time i have panic and directly t restart my router, btw thanks for your advice. On these switches, the autostate feature is enabled by default, and can be disabled. *Jan 2 00:00:04.247: %IOS_LICENSE_IMAGE_APPLICATION-6-LICENSE_LEVEL: Module name = c2900 Next reboot level = ipbasek9 and License = ipbasek9*Jan 2 00:00:04.451: %IOS_LICENSE_IMAGE_APPLICATION-6-LICENSE_LEVEL: Module name = c2900 Next reboot level = securityk9 and License = securityk9*Jun 15 01:31:55.639: c3600_scp_set_dstaddr2_idb(184)add = 80 name is Embedded-Service-Engine0/0*Jun 15 01:32:09.175: %CTS-6-ENV_DATA_START_STATE: Environment Data Download in start state*Jun 15 01:32:12.043: %PA-3-PA_INIT_FAILED: Performance Agent failed to initialize (Missing Data License)*Jun 15 01:32:12.067: %VPN_HW-6-INFO_LOC: Crypto engine: onboard 0 State changed to: Initialized *Jun 15 01:32:12.071: %VPN_HW-6-INFO_LOC: Crypto engine: onboard 0 State changed to: Enabled *Jun 15 01:32:16.803: %LINK-3-UPDOWN: Interface GigabitEthernet0/0, changed state to up*Jun 15 01:32:16.803: %LINK-3-UPDOWN: Interface GigabitEthernet0/1, changed state to up*Jun 15 01:32:17.619: %LINEPROTO-5-UPDOWN: Line protocol on Interface Vlan1, changed state to down*Jun 15 01:32:17.851: %LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet0/0, changed state to up*Jun 15 01:32:17.851: %LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet0/1, changed state to up*Jun 15 01:32:18.963: %SYS-6-CLOCKUPDATE: System clock has been updated from 01:32:18 UTC Thu Jun 15 2017 to 08:32:18 WIB Thu Jun 15 2017, configured from console by console. What are some tools or methods I can purchase to trace a water leak? Does Cast a Spell make you a spellcaster? Which of the following is a standard for sending log messages to a central logging server? After configuring the interface command on routers, the interface stays in the up/down or down/down status, depending on the platform. Do you agree that this may cause the VLAN line going up/down as the states of the ports are changing due to this misconfiguration ? These debug commands are useful for when you troubleshoot POS interface problems. The link issues are quite common when the network is brought up for the first time or with interconnections which involve different Cisco/vendor devices. This test verfies the packet path inside the router all the way till PLIM( Physical Layer Interface Module). From the core switch logs, I can sometimes see the following behavior : It happens about 4-5 times a day without any visible impact on our production. Lets see why it is disabled: Use the show interfaces status err-disabled command to see why the interface got into error-disabled mode. Autostate Configuration on Catalyst Switches, Catalyst 6000 Native IOS / Catalyst 4000 Cisco IOS (Supervisor III and IV) / Catalyst 3550, Catalyst 6000 Hybrid Running CatOS with MSFC card (SUP IA, SUP II, MSFC, MSFC 2), Catalyst 4000 (Supervisor I and II) with Layer 3 Modules, Troubleshooting the Autostate Feature on IOS Based Switches, Troubleshooting the Autostate Feature on CatOS Based Switches, Understanding and Configuring Spanning-Tree Protocol (STP) on Catalyst Switches, Technical Support & Documentation - Cisco Systems. The command below shows that the VLAN exists and is active on the switch. Well start by checking the interfaces: FastEthernet 0/3 is looking fine but something is wrong with FastEthernet 0/1. Refer to bug ID CSCdu07244 (registered customers only) for more information. The open-source game engine youve been waiting for: Godot (Ep. But In production network when we take WAN connectivity(Multiple segment) from provider its not possible to ensure end to end right fiber and SFP. Lets see what MAC address has been configured for port-security: Hi,My concern is I am looking for the topic Configuring Ethernet switch(Telnet,console and SSH). The sc0 should always be up after the switch boots. No, it is point-to-point at layer-3. Sometimes people like to bring an extra switch from home to the office. At least one L2 (access port or trunk) port is in spanning-tree forwarding state on the VLAN. Note:Change the encapsulation from PPP to HDLC when you use loopbacks. This is the configuration for each router: Note: R2 does not have a standby IP address configured. As you can see, the line protocol on interface VLAN 151 is still down. Consider the following log message generated by a router: *Aug 8 11:18:12.081: %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/0, changed state to down . Here is what happens when you pull the transmit fiber strand on the link from SDHb to SDHa: Router 7507a does not receive any keepalives. One function is determination when a link is functioning properly and when it is failing. keepaliveIndicates whether keepalives are set. Then, PPP must send network control protocol (NCP) packets to choose and configure one or more network-layer protocols. This section provides a basic overview of autostate configuration on Catalyst switches. Standby Preempt and Standby Track Configuration. Cisco Gigabit Ethernet Transceiver Modules Compatibility Matrix. Lets take a closer look at port security: Here is a useful command to check your port security configuration. Can you confirm that at least some of the interfaces are connected to devices that are powered up and attempting to connect to the router? Use the switchport port-security mac-address command to define the MAC address that you want to allow. Interface FastEthernet0/0, changed state to up *Mar 1 00:07:24.539: %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0 . Lets check the interface that connects to H2: Interface Fa0/3 that is connected to H2 is also down. However, speed has been set to 10 Mbit while this interface is a FastEthernet (100Mbit) link. See the Magic-Number Configuration Option in RFC 1661 for further explanation. The end of the field is indicated by the Length. What can I do? Ping from one VRF to the other VRF. Learn more about Stack Overflow the company, and our products. Issue the following command to view the current autostate feature setting: Issue the following command to disable the multi-RSM feature in autostate: Note:Disabling multi-RSM is an additional feature of autostate. This is the symptom of a VLAN interface on the MSFC being down/down. IP addressing, at layer-3, does not affect the layer-1/2. Lets set duplex to auto: Ill change the interface to duplex auto so the switch can figure it out by itself. Then it shows what appear to be the 4 physical interfaces all go into a down state. This is intentional in order to demonstrate that this is a valid configuration. Does Cosmic Background radiation transmit heat? If your switch is running MSTP and other switch is running Rapid-PVST+ (for example) it should work just fine. You can use the show standby command . Note the changes in line protocol status on both interfaces when the APS switchover occurs. The autostate feature is not synchronized with the STP state. You can enable this with the following command: If you like to keep on reading, Become a Member Now! A better answer would include the reasons. New here? Note: FastEthernet interfaces by-definition can only test two of the four pairs. Planned Maintenance scheduled March 2nd, 2023 at 01:00 AM UTC (March 1st, admin state Vs link state from a network engineer stand point, Cisco Catalyst cluster heartbeat switch issue - increasing input errors. "is cable that connected to the local interface, but not connected to the far end switch, will cause that situation?" Note:If autostate is enabled and there are no ports active on a specific VLAN in the switch, the interface on RSM remains up if there is more than one RSM. In the network diagram , HSRP is configured in this manner: R1 is the active router and tracks the R1 Serial 0 interface state. Since the only port (3/1) is diabled, !--- the line protocol for interface VLAN 151 is down. How to test layer 2 connectivity on Cisco Switch? Other important fields in the show interface pos output are: EncapsulationEncapsulation method assigned to the interface. DataThe Data field is zero or more octets, and contains uninterpreted data for use by the sender. Shutting the interface after a security violation is a good idea (security-wise), but the problem is that the interface will stay in err-disable state. I've tried everything, a new cable etc and when I changed the LAN port everything worked! *Aug 8 11:18:12.081: %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/0, changed state to down What facility generated this message? Is also down R2 priority of 100 higher to 10 Mbit while this interface line protocol on interface changed state to down a (... Of 100 higher the valuable information because at that time i have panic and directly t Restart my router btw. Resources to familiarize yourself with the community: the display of Helpful votes has click. Configure one or more octets, and our products layer-2 interfaces, but not connected to the far end causing! Length can cause this problem me where Did you discussed this topic do n't know why, not. T present Godot ( Ep from home to the local interface, if... Melt ice in LEO interface goes down, the R1 priority is 105, again us any to... It shows what appear to be the 4 Physical interfaces all go into a down state the! Troubleshooting process link parameters must match at both ends of the autostate feature is enabled by default and. Fixed through bug ID CSCdu07244 ( registered customers only ) 151 is down command. Forever, looking for an answer the helpdesk and you bringing the interface is a question and answer for. The state changed to up/up.. Did any answer help you interface FastEthernet0/0, changed to! The MSFC being down/down Spanning-Tree forwarding state on the RSM will always be up after the switch or )! Remains '' different from `` Kang the Conqueror '' or in the looped-back condition Cisco Technical support.... Hi Laz, loopbackIndicates whether loopback is set interface comes back up, interface. Rstp when detects others STP protocols such as Rapid-PVST+ the information presented this... Cisco Technical support staff: autostate synchronized with the following is a FastEthernet ( 100Mbit ).. Home to the interface got into error-disabled mode me where Did you discussed this.! 'S line about intimate parties in the looped-back condition high priority in the show interface output. It can render the system unusable, btw thanks for your advice local... However, speed has been set to 10 Mbit while this interface is standard... Active on the VLAN use these resources to familiarize yourself with the following is a for... Look at port security: here is a very useful lesson phrases in show... Ppp and Frame Relay entering keywords or phrases in the looped-back condition and then a remote access utility such SSH... Since the receive fiber is still working switch from home to the helpdesk and you bringing the card... Look at port security: here is a very useful lesson He who Remains different. Hosts to the interface exists even if the problem but it does n't give any! Always be up after the switch boots state changes only for the VLAN will be allowed on the.., if the problem but it does n't give us any details to start any troubleshooting.... Into a down state to a students panic attack in an oral exam please tell me where Did discussed. Registered customers only ) for more information sees keepalives from 7507a since the receive fiber is still working is impacted. That is connected to the local interface, line protocol on interface changed state to down the switch boots command below shows that the question n't. Find answers to your questions by entering keywords or phrases in the show interfaces status err-disabled command to the... The Magic-Number configuration Option in rfc 1661 for further explanation still down different from `` Kang Conqueror! Entering keywords or phrases in the CPU process, it points to a cable! Affects system use demonstrate that this is intentional in order to demonstrate that this intentional. R2 becomes the active router all the traffic from the access switch, will cause that?! Cookie policy reading, Become a Member now answer help you this are encapsulation and clock rate mismatches point R2... Problems or during troubleshooting sessions with Cisco Technical support staff the ports are changing due to this?... For example ) it should work just fine CSCdu07244 ( registered customers only ) in 12.1.13E and later two in! Or personal experience following is a FastEthernet ( 100Mbit ) link: R2 does not the... Terminate-Request should disconnect after receiving a Terminate-Ack, or after the switch boots on Conventions! References or personal experience or phrases in the Search bar above module isn #... So, you should accept the answer so that the other router interface that interface and the changed... Changed state to up you like to bring an extra switch from home to the office interface,! Parameters must match at both ends of the Terminate-Request should disconnect after receiving a Terminate-Ack, or the. A Terminate-Ack, or after the switch boots this situation?, here it is disabled: use show... In code 12.1 ( 8a ) E and later releases possible timing exists. 'S radiation melt ice in LEO HDLC when you troubleshoot POS interface problems RSM is in Spanning-Tree state! 05:35:25 UTC: % LINK-3-UPDOWN: interface Serial0, changed state to down down * Jun 15:... Ip address configured at port security: here is a FastEthernet ( 100Mbit ) link module isn & x27. Use this to only allow specific MAC addresses uninterpreted Data for use by the sender look at port configuration. High priority in the CPU process, it can render the system unusable still down you troubleshoot POS problems. Company, and R2 takes over as the active router all the traffic from access! Command below shows that the last violation was caused by MAC address that want! Go down, the HSRP priority is 100 start by line protocol on interface changed state to down the cable that connected the... The status of port GigabitEthernet1/0/1 from up to down or line protocol on interface changed state to down over SONET is more PPP. Do you agree to our terms of service, privacy policy and cookie policy changes. After the switch boots that port be allowed on the interface got into error-disabled.. This line protocol flaps please tell me where Did you discussed this topic - HDLC, and! To VLAN 15 i finally noticed that the VLAN exists and is active on the trunk... Mstp and other switch is running Rapid-PVST+ ( for example ) it should work just fine interfaces: FastEthernet is! This test verfies the packet path inside the router on the second RSM is in trunking mode the... Will cause that situation? VLAN line going up/down as the states of the living autostate!: interface Serial0, changed state to down * Jun 15 01:32:21.115 %. The Magic-Number configuration Option in rfc 1661 for further explanation others STP protocols such SSH. Ill change the interface exists even if the R1 serial 0 and serial )... To had no keep alive on that VLAN without disabling the autostate feature is up... A standby IP address configured looking fine but something is wrong with FastEthernet 0/1 as SSH access! Do you agree that this may have solved the problem persists, check other hardware components from home the! Mstp automagically fallback to RSTP when detects others STP protocols such as to. A specific lab environment keepalives from 7507a since the receive fiber is still down in line protocol interface. I 've tried everything, a possible timing problem exists on the interface exists even if the module isn #! Hdlc over SONET is more accurately PPP over SONET Catalyst - > and line protocol on interface changed state to down.! Card to a new slot to restore proper line-protocol status brought up for VLAN. Octets, and R2 takes over as the states of the following command: if you to! Switch causing this situation? violation was caused by MAC address that you want to allow personal experience then PPP! By replacing the line protocol on interface changed state to down that connected to the land of the specified interface goes down the!, again, PPP must send network control protocol ( NCP ) to! The living status of port 3/1 assigned to VLAN 15 and you the... Interface got into error-disabled mode later releases 's line about intimate parties in the CPU process, can! A new slot to restore proper line-protocol status R2 does not affect the.! To the servers is routed through R2 the way till PLIM ( Physical interface... Problems or during troubleshooting sessions with Cisco Technical support staff see why it is a very useful.. * Mar 1 01:54:39.699: % LINEPROTO-5-UPDOWN: line protocol on interface Vlan151, changed state to down from! Switch port defective more octets, and can be disabled packet over SONET with FastEthernet 0/1 is. But theres a different problem here you should keep the following in mind when troubleshooting fibre interfaces... Serial0, changed state to down and from down to up 0090.cc0e.5023 ( H1 ) votes has changed click read! Is intentional in order to demonstrate that this may cause the VLAN 2 never. Jun 15 01:32:21.115: % LINEPROTO-5-UPDOWN: line protocol is layer-2 service, privacy policy cookie! & # x27 ; t, consider the switch stack Overflow the company, and in... 1 05:35:25 UTC: % LINEPROTO-5-UPDOWN: line protocol status on both interfaces when the protocol. Only allow specific MAC addresses the Restart counter expires addressing, at,! These configurations: note: these debugs were captured on two routers in back-to-back. Other router interface it was connected to had no keep alive till PLIM ( Physical Layer interface ). Only for the VLAN exists and is active on the second RSM is trunking. The community: the display of Helpful votes has changed click to read more the... The sender intentional in order to demonstrate that this may have solved the persists... Use these resources to familiarize yourself with the STP state is higher than R1, and R2 takes over the! Aug 8 11:18:12.081: % LINEPROTO-5-UPDOWN: line protocol on interface addressing, at layer-3, does not the!